Pump



, 1,550,832 R. F. METCALFE v PUMP Aug. 25. 1925.

Filed Aug, 30, 1922 3 sheets-Sheet 2 GAS PUWWS All Patented Aug. 25, 1925 ROBERT F. IVIETCALFE, OF ERIE, PENNSYLVANIA, ASSTGNOR, BY MESNE ASSIGNMENTS,

'IIIO` SOCONY BUR-NER CORPORATION, 0F WILMINGTON, DELAWARE, A CORPORA- TION' OlE DELAWARE.

PUMP.

Application filed August 30, 1922. Serial No. 585,220.

To all whom t may concern:

Be it known that l, ROBERT F. METCALFE, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful improvements in Pumps, of which the following is a specification.

This invention is designed to improve the construction of air pumps. As shown the pump is particularly designed for supplying pressure for atomizing fuel. Tn carrying out my invention l provide preferably a double cylinder, the pistons of which alternate and house or enclose these cylinders in the receiver, the pump discharging directly through its walls into the receiver. T preferably form the crank chamber for driving the pumps and having the mounting or base of the cylinders forming a closure between the receiver and the crank chamber. Features of the invention will appear from the specification and claims.

The invention is illustrated in the accompanying drawings as follows Fig. 1 shows a central section through the pump on the line 1--1 in Fig. 2.

Fig. 2 a plan view of the pump.

Fig. 3 a section on the line 3 3 in Fig. 2.

Fig. 4 a section on the line 4 4 in Fig. 2.

1 marks the crank case in which is arranged the crank chamber. "his has the opposing openings 2 in which are arranged the bearing blocks 3. A crank shaft 4 is mounted in the bearing blocks 3 and the cranks or eccentrics 5 are mounted on the sha-ft 4. The eccentrics have extensions 6 on which are mounted the driving worm' gears 7, the worm gears being locked with the eccentrics by pins 8. A worm 9 is carried by a drive shaft 92L and this is mounted in ball bearings 10 arranged in openings 11 in the case. Cylinders 12 are cast in block and have a circular flange 13 formed at the bottoms of the cylinders, this circular Hange seating on the upper edge at 14 on the crank case. A receiver 15 extends over the cylinders and has a flange 16 arranged over the flange 14a on the case. The receiver has a seat 17 which seats on the flange or base 13, the base being clamped between the upper edge of the case and the receiver by bolts 18 which extend through the flange 16 into the flange 14a. The receiver forms a receiver chamber 19 between the walls of the receiver and the walls of the cylinders, thus eliminating all pipe connections, etc. from the discharge of the cylinders to the receiver.

Pistons 20 operate in the cylinders. These have the connecting pins 21, connecting rods 22 operating on the cranks or eccentrics in the usual manner.

The inlet valve openings 23 are arranged at the upper ends of the cylinders, and each has an inlet valve seat 24 arranged around the opening which is closed by the inlet valve 25. The inlet valve has a stem 26 eX- tending through a spider 27 and is drawn to closed position by a spring 28. A connection 29 is screwed into the end of the opening 23 and extends through an opening 28 in the end of the receiver. The connection has a flange 31 which is drawn down against a seat 30 on the receiver making a closure.

An elbow 34 is screwed into a screwthreaded opening 33 in the connection 29 and leads to a pipe 35, the inlet pipe 35 carrying the air in from some suitable source.

The discharge opening 36 is in the form of a drilled hole in the wall of the cylinder opening into the cylinder. It has a valve seat 37 on which a ball check 38 rests. .The ball check is forced to its seat by a spring 39. This spring is locked in position and adjusted by a screw 40 having openings 41. Each cylinder s provided with a similar valve, A discharge pipe 42 leads from the receiver.

A relief valve 43 is supplied for the receiver. It has a body 44 which has a screwthreaded end 45 screwed into a screwthreaded opening 46 in the receiver wall. A ball check 47 operates on a seat 48 and is held in position by a spring-actuated follower 49 under the pressure of a spring 50. The spring is adjusted by a screw 51 screwed into the end of the body and is locked in adjustment by a set screw 52.

In order to drain the oil that may accumulate in the receiver l provide an opening 53 through the base or flange 13. This opening is screw-threaded and a valve plug 54 is screwed into it. The valve plug has an axial opening 56 and a radial opening 57 communicating with the opening 56. By screwing out the plug 54 so as to expose the opening 57 oil is drained from the receiver to the crank case. In order to make the plug accessible and operable from without the receiver it is provided with a slot 58 which may be reached through the opening 46 by removing the relief valve.

What I claim as new is 1. In a pump, the combination of a crank case; a pump cylinder; a receiver in which the cylinder is enclosed and to which it discharges; and a liange on the cylinder forming a closure between the crank case and the receiver.

2. In a pump, the combination of two cylinders having a circular flange surrounding the two cylinders; and a receiver enclosing the cylinders and to which they discharge and having a seat conforming to the flange on the cylinders and forming a oint therewith.

3. In a pump, the combination of two cylinders having a circular flange surrounding the two cylinders; a crank case; and a receiver to which the cylinders discharge, the crank case and receiver having seats conforming to the circular iange and secured thereto.

4c. In a pump, the combination of two cylinders having a circular flange; a crank case; and a receiver, the crank case and receiver having seats conforming to the circular flange and clamped together and clamping the circular flange between them.

5. In a pump, the combination of a pump cylinder; a receiver enclosing the pump cylinder; and inlet valve for the pump; and an inlet connection screwed into the inlet valve opening and extending through the receiver.

6. In a. pump, the combination of a pump cylinder; a receiver enclosing the pump cylinder; and inlet valve for the pump; and an inlet connection screwed into the inlet valve opening and extending through the receiver and having a flange seating on the receiver.

7. In a pump, the combination of a pump cylinder; a receiver enclosing the pump cylinder and to which the cylinder discharges; an oil drain con'iprising a drain opening from the receiver; a valve in the opening and extending into the receiver; and an opening through the receiver opposite the valve and adapted to expose the valve for operation.

8. In a pump, the combination of a cylinder having a flange thereon with a drain opening therethrough; a receiver enclosing the cylinder and to which the cylinder discharges, said receiver being seated on the flange; and a valve controlling the drain opening and extending into the receiver, said receiver having an opening therethrough eX- posing the valve for operation.

9. In a pump, the combination of a pump cylinder; a receiver enclosing the pump cylinder and to which the cylinder discharges; an oil drain comprising a drain opening from the receiver; a valve in the opening and extending into the receiver; an opening through the receiver opposite the valve and adapted to expose the valve for loperation; and a relief valve in the opening in the receiver.

l0. In a pump, the combination of a pump cylinder; a receiver enclosing the pump cylinder and to which the receiver discharges; a drain valve for the receiver comprising a valve opening` in which there is a screwthreaded plug; said plug having an opening therethrough opened and closed by screwing the plug int-o and out of the valve opening, said receiver having an opening therethrough exposing the plug for operation.

In testimony whereof I have hereunto set my hand.

RQBERT F. METCALFE. 

